‘Simplify as much as you can, but not any further’ 

Key to evaluating complex interventions is SIMPLIFYING what complex interventions are and how are they intended to work. Simplify as much as you can but not any further. The following are some questions we have found helpful in simplifying complex interventions. The questions are intended to both inform planning and evaluation of complex initiatives.

Depending on the nature of the complex interventions, some of these questions might need to be modified.